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Acidified K2Cr2O7 solution turns green w...

Acidified `K_2Cr_2O_7` solution turns green when `Na-2SO_3`, is added to it. This is due to the formation of

A

`Cr_2(SO_4)_3`

B

`CrO_4^(2-)`

C

`Cr_2(SO_3)_3`

D

`CrSO_4`

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